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Subject: Re: Lucene usage statistics
From: Grant Ingersoll
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Date: Fri, 19 Nov 2010 06:54:17 -0500
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On Nov 18, 2010, at 10:24 AM, Ugo Scaiella wrote:
> Thank you for your reply.
> May you tell me where you saw such estimates?
>=20
> Ugo
>=20
> 2010/11/18 Grant Ingersoll
>=20
>> Unfortunately, there isn't, since people don't have to let us know =
that
>> they are using it. I've seen estimates ranging from 4K - 180K =
deployments.
The 4k is one we estimated and is based on the number of applications we =
think have been developed using Lucene/Solr, the 180K is one I saw from =
an analyst a while back: =
http://arnoldit.com/wordpress/2008/12/05/new-open-source-search-vendor/ =
and is likely based on the number of places it has been installed =
regardless of how it was delivered (either via a 3rd party app or via a =
in-house development)
You might also see https://www.osscensus.org/summary-report-public.php
I guess it depends on how you count things. For instance, Lucene/Solr =
is embedded in Drupal, Alfresco, Typo3, Jackrabbit and many other CMSes, =
do you count each one of those? It's also in things like IBM Omnifind =
and EMC's Documentum as well as many other vendors, does every =
installation of that count? If that is the case, then 180K is probably =
conservative. If you just count the number of applications that use it =
and not deployments, the 4K number is probably a little low but in the =
ballpark.
In the end, though, it's all a big guessing game, so I wouldn't put too =
much faith in any number. The ASF has mirrors worldwide, so it is =
impossible to know how many downloads there are, much less how many =
people actually put it into production. =20
-Grant=